Design
The model CPD8500 digital deadweight tester is an instrument that combines the performance of a manual pressure balance with the efficiency and usability of a compact digital primary standard. The instrument offers a broad pressure range with various measuring heads from 1 … 500 bar gauge (15 … 7,250 psig) and 1 … 20 bar abs (15 … 290 psia). The CPD8500 digital deadweight tester is housed with an internal environmental monitoring module, a head temperature probe and a precision vacuum transducer for automatic detection of sensitive parameters. An optional internal or extenal barometric reference provides versatility with gauge or absolute pressure modes.

Application
Accuracies as high as 35 ppm of reading make the CPD8500 comparable to a reference primary standard and an ideal tool for calibrating transfer standards. In absolute mode, the CPD8500 offers continuous measurement, unlike a traditional piston gauge where vacuum is interrupted to load masses. This makes the instrument an easy and fast solution for premium calibrations. The internal automatic lubrication system drives higher & lower
pressure ranges without the need for an additional pressure supply, limiting contamination and enhancing the piston cylinder system performance.

Ease of use
The CPD8500 utilizes proven piston gauge technology with a high accuracy load cell for precision calibration without the need to load any external mass sets. The displayed pressure value is internally compensated for changes in ambient conditions, local gravity and piston cylinder temperature. This eliminates the need for manual or external complex calculations. The CPD8500 base has integral leveling feet for easy leveling. The feet are padded to reduce vibrational effects. The instrument also supports full backward compatibility to the absolute and gauge measuring heads of its predecessor, CPD8000.

Intuitive user interface
The CPD8500 digital deadweight tester is easy to use with the touchscreen display and an intuitive user interface. The software is capable of storing information of up to eight measuring heads for quick measuring head setup and operation. The CPD8500 software offers the ability to perform up to 11 point in-instrument adjustments on the various sensors installed inside. Additionally, the instrument can also be remotely controlled using ether the Mensor standard or the CPD8000 command sets.There is an IEEE-488.2, RS-232, USB and Ethernet interface for communication with other instruments, so the CPD8500 can be integrated into existing systems.